Toothbrush



FIG. 1 is a side elevational view of a toothbrush showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is an exploded side elevational view thereof. 

The ornamental design for a toothbrush, as shown and described. 